Hello, I have problem with my Phantom 2 Vision Plus. Today I was flying it, I had to shoot the view from a building, still to be build, to present to potential clients. The top of the building would be 68 meters. Every time I send it up, the connection got broken between 40 and 50 meters height. Everytime I let it come down (going home) and tried it again. I did this 3 times, never worked fine. The last time, all of a sudden the drone started to wobble and started to come down very fast, I had no control anymore. I tried to catch it to break the fall, it flew a bit further and crashed upside down. What can be the problem? I don't know if I can fly it again. Imagine it would have ended up in front of a car, in water, hurt somebody... The max height was set to 120meters, I had 9 satelites on the GPS, no magnetic sources in the neighbourhood, all batteries were fine. It was connected to an iPhone. There was no reason whatsoever for this to happen. I hope you guys can help me out. Thank you !